U.S. patent application number 13/510520 was filed with the patent office on 2012-11-08 for adapter for connecting a connecting element at the end of a wiper arm to a wiper blade in particular of flat beam construction.
This patent application is currently assigned to ROBERT BOSCH GMBH. Invention is credited to Helmut Depondt.
Application Number | 20120279008 13/510520 |
Document ID | / |
Family ID | 43877800 |
Filed Date | 2012-11-08 |
United States Patent
Application |
20120279008 |
Kind Code |
A1 |
Depondt; Helmut |
November 8, 2012 |
ADAPTER FOR CONNECTING A CONNECTING ELEMENT AT THE END OF A WIPER
ARM TO A WIPER BLADE IN PARTICULAR OF FLAT BEAM CONSTRUCTION
Abstract
The invention is based on an adapter (16) for connecting a
connecting element (30, 32, 34, 36, 38, 40) at the end of a wiper
arm (18, 20, 22, 24, 26, 28) to a wiper blade (10) in particular of
flat beam construction, wherein the adapter (16) has a base element
(42). It is proposed that the base element (42) have a U-shaped
cross-sectional profile which is formed from a base (56) and two
side walls (48) and which, at that end side thereof which faces
away from the wiper arm (18, 20, 22, 24, 26, 28), is closed off by
a closure cap (44), that spring arms (68) be integrally formed on
the side walls (48) of the base element (42), which spring arms
(68) extend in the longitudinal direction (124) toward the closure
cap (44), engage into the latter and latch with buttons (70) into
cutouts (84) which are provided in side walls (82) of the closure
cap (44), and in that longitudinally directed bars (78) are
arranged on the inner sides of the side walls (82) of the closure
cap (44), which bars (78) are guided in a movable manner in cutouts
(60) of the side walls (48) of the base element (42) when the
buttons (70) are released, and which bars, in the closed state,
block transversely running assembly gaps (62) and close off
receiving chambers (66) for locking cams (104, 120).
Inventors: |
Depondt; Helmut; (Kessel-Lo,
BE) |
Assignee: |
ROBERT BOSCH GMBH
Stuttgart
DE
|
Family ID: |
43877800 |
Appl. No.: |
13/510520 |
Filed: |
September 21, 2010 |
PCT Filed: |
September 21, 2010 |
PCT NO: |
PCT/EP10/63918 |
371 Date: |
July 25, 2012 |
Current U.S.
Class: |
15/250.32 |
Current CPC
Class: |
B60S 1/4087 20130101;
B60S 1/387 20130101; B60S 2001/4054 20130101; B60S 1/4003 20130101;
B60S 1/407 20130101 |
Class at
Publication: |
15/250.32 |
International
Class: |
B60S 1/40 20060101
B60S001/40 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 17, 2009 |
DE |
10 2009 046 788.2 |
Sep 21, 2010 |
DE |
10 2010 041 152.3 |
Claims
1. An adapter (16) for connecting a connecting element (30, 32, 34,
36, 38, 40) at the end of a wiper arm (18, 20, 22, 24, 26, 28) to a
wiper blade (10) wherein the adapter (16) has a base element (42),
characterized in that the base element (42) has a U-shaped
cross-sectional profile which is formed from a base (56) and two
side walls (48) and which, at an end side thereof which faces away
from the wiper arm (18, 20, 22, 24, 26, 28), is closed off by a
closure cap (44), in that spring arms (68) are integrally formed on
the side walls (48) of the base element (42), which spring arms
(68) extend in a longitudinal direction (124) toward the closure
cap (44), engage into the closure cap and latch with buttons (70)
into cutouts (84) in side walls (82) of the closure cap (44) and in
that longitudinally directed bars (78) are arranged on inner sides
of the side walls (82) of the closure cap (44), which bars are
guided in a movable manner in cutouts (60) of the side walls (48)
of the base element (42) when the buttons (70) are released, and
which bars, in a closed state, block transversely running assembly
gaps (62) and close off receiving chambers (66) for locking cams
(104, 120).
2. The adapter (16) according to claim 1, characterized in that the
bars (78), in the closed state, engage with free ends thereof in
cutouts (92) on sides of the assembly gaps (62) opposite to end
sides (90) of the bars (78).
3. The adapter (16) according to claim 2, characterized in that the
cutouts (92) on the sides of the gaps have a detent (64) on edges
thereof, said detent latching with a detent edge (65) on an edge of
the end side (90) of the bar (78).
4. The adapter (16) according to claim 1, characterized in that
stops (72) are provided on the spring arms (68), the stops
delimiting opening movement of the closure cap (44).
5. The adapter (16) according to claim 4, characterized in that the
spring arms (68) run outwardly offset relative to the side walls
(48) and form shoulders (69), which serve as stops for end sides
(127, 129) of the connecting element (34, 36).
6. The adapter (16) according to claim 1, characterized in that the
base element (42) has a play compensation button (50) in a region
of the end side thereof, which faces the wiper arm (18, 20, 22, 24,
26, 28), said button being connected via a spring tongue (52) to an
intermediate base (58), which connects the two side walls (48) of
the base element (42).
7. The adapter (16) according to claim 6, characterized in that the
play compensation button (50) has a detent edge (65) on a side
facing the spring arms (68) and serves as a further securing means
for the connecting element (30, 32) of the wiper arm (18, 20).
8. The adapter (16) according to claim 6, characterized in that the
base element (42) has, in a region of the play compensation button
(50), a play compensation recess (74) on outer sides of the side
walls (48).
9. The adapter (16) according to claim 6, characterized in that the
base element (42) has play compensation surfaces (47, 49) in a
region of the spring tongue (52), which play compensation surfaces
run in an inwardly inclined manner from the base (56) to an upper
edge of the side walls (48).
10. The adapter (16) according to claim 1, characterized in that
the end sides (99) of the side walls (82) of the closure cap (44)
which face the wiper arm (18, 20, 22, 24, 26, 28) are concave and
can serve as stops for the connecting element (30, 32) of the wiper
arm (18, 20) or of a protective cap (46).
11. The adapter (16) according to claim 10, characterized in that
the protective cap (46) has a U-shaped cross-sectional profile
formed from a top wall (96) and two side walls (94) and encloses
the base element (42) laterally and from above with the side walls
(94) of the protective cap and the top wall (96) of the protective
cap and with convex end sides (98) of the side walls (94) of the
protective cap flushly adjoining opposing concave end sides (99) of
the side walls (82) of the closure cap (44), wherein, in an
assembled state, locking cams (104) on inner sides of the side
walls (94) of the protective cap (46) engage in receiving chambers
(66) at an end of the assembly gaps (62) and wherein an end side
(100) of the protective cap (46) facing the wiper arm (18, 20, 22,
24, 26, 28) has an aperture (108).
12. The adapter (16) according to claim 11, characterized in that
the protective cap (46) has lateral, inwardly resiliently pliable
detent wings (106), which have angled stops (140) facing the
closure cap (44) and stops (142) running approximately
perpendicularly to the longitudinal direction (124).
13. The adapter (16) according to claim 11, characterized in that
the protective cap (46) has a detent cam (154) in a region of the
aperture (108) on the end side.
14. The adapter (16) according to claim 1, characterized in that a
stop (142) for an end side (151) of the connecting element (38) is
provided on an inner side of the end wall (86) of the closure cap
(44).
15. The adapter (16) according to claim 1, characterized in that
when mounting one type of wiper arm (18, 20) in comparison to
mounting another type of wiper arm (22, 24, 26, 28), said adapter
assumes a position relative to the wiper blade (10) which is
rotated about an angle (.alpha.) with respect to a free end of said
wiper blade (10).
16. The adapter (16) according to claim 15, characterized in that
the angle (.alpha.) lies in the range between 4.degree. and
8.degree..
17. The adapter (16) according to claim 10, characterized in that
the base element (42) comprises a hub (54) which is open towards a
top and above which the side walls (48) of the base element (42)
project, wherein the side walls (48) in the region of the hub (54)
are clip-like and the protective cap (46) has a bearing aperture
(168) at least in one side wall (94).
Description
BACKGROUND OF THE INVENTION
[0001] The invention is based on an adapter for connecting a
connecting element at the end of a wiper to a wiper blade, in
particular of flat beam construction.
[0002] The German patent publication DE 20 2005 021 307 U1
discloses a connecting device for the articulated connection of a
wiper blade of flat beam construction, which connecting device is
suitable for different wiper arms. The connecting device comprises
at least one single-part or multi-part connector element which is
fastened fixedly, but releasably, to a supporting element in the
form of spring rails. An adapter is provided between each wiper arm
and the wiper blade, which on the one hand comprises connecting
options for the connector element and on the other hand connecting
options for one of the wiper arms or for connecting elements, which
are fixedly connected to the respective wiper arm or integrally
formed on the same. A joint, the joint axis of which extends
transversely with respect to the longitudinal direction of the
wiper blade, is disposed between one of the connecting elements and
an adapter, which is connected in a torque-proof manner to the
connector element, or between a part of the adapter, which is
connected in a torque-proof manner to said connector element and a
part of the adapter, which is connected in a torque-proof manner to
the connecting element. There are therefore three different
adapters for three different connecting elements of the wiper
arms.
[0003] The connector element is suitable for a wiper arm having a
hook-shaped end or a hook-shaped connecting element or is suitable
for a wiper arm having an end or connecting element comprising a
lateral bearing pin and a bridge in accordance with a known
sidelock principle for a wiper arm having an end or connecting
element, whereat the wiper arm runs substantially in a straight
line above the wiper blade, and is connected to the connector
element in accordance with the toplock principle.
SUMMARY OF THE INVENTION
[0004] According to the invention, the base element 42 has a
U-shaped cross-sectional profile which is formed from a base and
two side walls and which, at that end side thereof which faces away
from the wiper arm is closed off by a closure cap. Spring arms are
integrally formed on the side walls of the base element, which
spring arms extend in the longitudinal direction, engage into the
closure cap and latch with buttons into cutouts which are provided
in the side walls of said closure cap. The cutouts can, for
example, be designed as apertures or as recesses so that the
buttons in the first case can be actuated through the apertures,
whereas in the second case said buttons are covered to the outside
by the side walls and can be released using a tool. In addition,
longitudinally directed bars are arranged on the inner sides of the
side walls of said closure cap, which bars are guided in a movable
manner in cutouts of the side walls of the base element when said
buttons are not latched in the cutouts in the side walls of said
closure cap. In the closed state, when the buttons are latched in
the cutouts of the side walls of said closure cap, the bars block
transversely running assembly gaps and thereby close off receiving
chambers for locking cams. By means of this device, connecting
elements of wiper arms or a protective cap can be connected to the
adapter in a loss-proof manner. Said adapter can in turn be mounted
in a usual manner on a connecting element attached to the wiper
blade.
[0005] During assembly, the corresponding wiper arms or
respectively the first and second connecting elements thereof,
which have an open U-shaped cross-sectional profile towards the
adapter and comprise inwardly facing locking cams on the lower
edges of the side walls thereof, are inserted in the direction of a
vertical axis into the assembly gaps of the side walls of the base
element and up into the receiving chambers at the ends of the
assembly gaps, wherein the closure cap assumes an open position.
When the locking cams are situated in the receiving chambers, the
closure cap is closed, wherein the bars block the assembly gaps
above said receiving chambers so that the locking cams can no
longer release from said receiving chambers. In the end position,
the buttons, which are located at the ends of the spring arms
connected to the base element latch into the cutouts of the side
walls of the closure cap, and therefore said closure cap is secured
from being opened unintentionally.
[0006] During disassembly, the buttons are pressed inwardly so that
the closure cap can again be pushed into the open position and the
bars unblock the assembly gaps. A stop advantageously limits the
opening travel of the bars; and therefore during assembly and
disassembly, said bars cannot inadvertently slide out of the
cutouts of the base element, in which they are guided.
[0007] According to one embodiment of the invention, it is proposed
that in the closed state, the bars engage with the free ends
thereof in cutouts on the sides of the assembly gaps opposite to
the end sides of the bars. In so doing, the bars are also supported
at the free ends thereof in the closed state, whereby they are also
able to withstand high impact loads. It is therefore advantageous
if the cutouts have in each case a detent on one of the edges
thereof, which locks with a detent edge on the free end of the bars
and only releases said detent edge when an elevated releasing force
occurs in the longitudinal direction of the bars.
[0008] The spring arms advantageously run offset towards the
outside with respect to the side walls and thus form shoulders,
which serve as stops for end sides of the third or fourth
connecting element.
[0009] In order to minimize the play between the connecting element
and the adapter, it is advantageous for the adapter to have a play
compensation button at the end thereof facing the wiper arm, which
button is connected to an intermediate base via a spring tongue,
said intermediate base connecting the two side walls of the base
element. The play compensation button interacts with a matching
opening in the corresponding first or second wiper arm. Said play
compensation button can advantageously have a detent edge on the
side thereof facing the spring arms and serve as a further securing
means for the first or second connecting element. In the region of
the play compensation button, the base element has additionally a
play compensation recess on the exterior side of the side walls.
Said play compensation recesses can interact with first play
compensation ribs of corresponding wiper arms, e.g., of the first
connecting element of the first wiper arm and minimize the lateral
play of the wiper blade. Finally, the base element can comprise
play compensation surfaces in the region of the spring tongue on
the exterior walls of the side walls thereof. Said compensation
surfaces interact with second play compensation ribs of
corresponding wiper arms, e.g., of the second connecting element of
the second wiper arm and likewise minimize the lateral play of the
wiper blade. Starting at the base of the base element and extending
to the upper edge of the side walls, the play compensation surfaces
are slightly inclined to the inside in order to facilitate
assembly.
[0010] In a further configuration level, the adapter comprises a
protective cap, which has a U-shaped cross-sectional profile formed
from a base and two side walls, said profile encompassing the base
element laterally and from above with the side walls and the top
wall thereof. The protective cap flushly adjoins with the end face
thereof the opposing end face of the closure cap; wherein in the
assembled state, locking cams on the interior sides of the side
walls of the protective cap engage in the receiving chambers at the
end of the assembly gaps of the base element. The end face of the
protective cap facing the wiper arm has an aperture. Said aperture
is used for the assembly of additional different wiper arms.
[0011] In order to secure corresponding wiper arms, the protective
cap has lateral, inwardly resiliently pliable detent wings on the
end thereof facing the wiper arm, said detent wings comprising
angled stops and stops running approximately perpendicularly to the
longitudinal direction. For the same purpose, it is proposed
according to a further embodiment of the invention that the
protective cap has a detent cam in the region of the aperture,
which is located on the end face and faces the wiper arm. Said
detent cam interacts with a corresponding detent aperture of the
associated fifth wiper arm.
[0012] Whereas the third to the sixth wiper arm can be mounted with
the corresponding third to sixth connecting elements if the adapter
runs substantially parallel to the wiper blade, the adapter for
mounting the first or second wiper arm is rotated about an angle
.alpha., preferably between 4.degree. and 8.degree. with respect to
the free end of the wiper blade. As a result of the varying angle
.alpha., a sufficient clearance is obtained for the mounting of the
first and second wiper arm. It is further possible, to insert the
third to the fifth connecting elements into the adapter through the
aperture on the end face and to press the play compensation button
downwards.
[0013] In order to be able to mount a wiper arm according to the
side lock principle, the base element has a hub, which is open
towards the top and above which the side walls of the base element
project, wherein said side walls are configured clip-like in the
region of the hub, and the protective cap has a bearing aperture
aligned to the hub at least in one side wall.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Further advantages ensue from the following description of
the drawings. Exemplary embodiments are depicted in the drawings.
The drawings, the description and the claims contain numerous
features in combination. The specialist in the field should also
advantageously consider the features individually and put them
together in further useful combinations.
[0015] In the drawings:
[0016] FIG. 1 shows a perspective partial view of six wiper arm
ends in a set and a wiper blade comprising an adapter according to
the invention,
[0017] FIG. 2 shows a perspective partial view of the six wiper arm
ends according to FIG. 1 mounted on the adapter according to the
invention,
[0018] FIG. 3 shows the adapter according to the invention in a
perspective exploded view,
[0019] FIG. 4 shows the inventive adapter pursuant to FIG. 3 in the
assembled state,
[0020] FIG. 5 and FIG. 6 show a first wiper arm while being mounted
to an adapter according to the invention,
[0021] FIG. 7 shows a second wiper arm while being mounted to an
adapter according to the invention,
[0022] FIG. 8 to FIG. 10 show a third wiper arm while being mounted
to an adapter according to the invention,
[0023] FIG. 11 shows a fourth wiper arm while being mounted to an
adapter according to the invention,
[0024] FIG. 12 and FIG. 13 show a fifth wiper arm while being
mounted to an adapter according to the invention and
[0025] FIG. 14 shows a sixth wiper arm while being to an adapter
according to the invention.
DETAILED DESCRIPTION
[0026] The wiper blade 10 depicted in FIG. 1 has a wiper strip,
which is covered by a spoiler 12, which has end caps 14 on the ends
thereof. The spoiler 12 is connected in a conventional manner to
the wiper strip, which is not visible, via a supporting element in
the form of one or a plurality of spring rails, which are likewise
not visible. A connector element, on which an adapter 16 sits, is
attached in a conventional manner to the support element. The
adapter 16 facilitates the articulated connection of the wiper
blade 10 to six different wiper arms 18, 20, 22, 24, 26 and 28.
Said wiper arms have different connecting elements 30, 32, 34, 36,
38 and 40, which are detachably connected to said adapter 16. The
connecting elements 30, 32, 34, 36, 38, 40 can be integral
constituents of the wiper arms 18, 20, 22, 24, 26, 28 or be rigidly
connected to said wiper arms 18, 20, 22, 24, 26, 28 as individual
components. FIG. 2 shows the six wiper arms 18, 20, 22, 24, 26, 28
mounted to said adapter 16.
[0027] The adapter 16 comprises a base element 42 and a closure cap
44 for connecting to a first wiper arm 18 or a second wiper arm 20,
whereas a protective cap 46 is required for connecting to a third
wiper arm 22 or fourth wiper arm 24 or fifth wiper arm 26 or sixth
wiper arm 28. The individual parts of the adapter 16 are depicted
in FIG. 3. The base element 42 has two side walls 48, which are
connected to each other by means of a base 56 and an intermediate
base 58 and project above the same in the direction of a vertical
axis. The end face of the base element 42 facing away from the
wiper arms 18, 20, 22, 24, 26, 28 is covered by the closure cap 44.
Said closure cap has a U-shaped cross-sectional profile, which is
open towards the spoiler 12 and is formed from two side walls 82
and a top wall 80 connecting said two side walls. In the direction
of the free end, said closure cap 44 has an end wall 86 comprising
a connection profile 88 for the spoiler 12. Bars 78 are integrally
formed on the inner sides of the side walls 82, which bars run in
the longitudinal direction 124 and in the mounted state are guided
in a longitudinally movable manner in cutouts 60 on the outer sides
of the side walls 48 of the base element 42. The cutouts 60 are
delimited downwards by the base 56, which has guide edges 76 on the
longitudinal sides thereof in the region of the cutouts 60.
[0028] If the closure cap 44 is closed, the bars 78 extend across
assembly gaps 62 in the side walls 48 of the base element 42, which
run transversely to said bars. In the closed state, said bars 78
block the assembly gaps 62 so that receiving chambers 66 form on
the end of the assembly gaps 62 in the direction of the base 56. In
order to ensure said bars 78 are securely held on the free ends
thereof, cutouts 92 are provided on the sides of said assembly gaps
62 which are opposite to the end sides 90 of said bars 78. Said
bars 78 engage to some extent into the cutouts 92 and by means of
detent edges 65 in the region of the end face 90 thereof latch with
detents 64 on the lower edges of said cutouts 92.
[0029] On the end face of the base element 42 facing the closure
cap 44, spring arms 68 running in the longitudinal direction are
formed on the side walls 48. Said spring arms run outwardly offset
with respect to the side walls 48 of the base element 42 and have
buttons 70 facing laterally outwards on the free ends thereof, said
buttons latching from the inside into cutouts 84 in the side walls
82 of the closure cap 44. As a result of the offset, the spring
arms 68 form shoulders 69, which serve as stops for end sides 127,
129 of the third or fourth connecting element 34, 36 of the third
or fourth wiper arm 22, 24.
[0030] The cutouts 84 of the closure cap 44 can be designed as
apertures or recesses. The spring arms 68 fix the final assembly
position of the closure cap 44. Said spring arms further have at
least one stop 72, whereby the opening movement of said closure cap
44 is delimited so that the bars 78 also remain guided in the
cutouts 60 of the base element 42 in the open position of said
closure cap 44. As a result, the assembly and disassembly of the
wiper arms 18, 20 as well as the protective cap 46 are
substantially simplified.
[0031] The base element 42 has a play compensation button 50, which
is connected to the intermediate base 58 via a spring tongue 52, in
the region of the end face thereof on the wiper arm side in order
to mount the first wiper arm 18 and the second wiper arm 20. The
play compensation button can further serve as an additional
securing means of the adapter 16. For this reason, it is
advantageous for said button to have a detent edge 51 on the side
thereof facing the spring arms 68. In the region of the play
compensation button 50, play compensation recesses 74 are also
provided in the outer sides of the side walls 48. Play compensation
ribs 118 of the second connecting element 32 of the second wiper
arm 20 fit into said compensation recesses. Play compensation
surfaces 47, 49, which interact with the first play compensation
ribs 117 of the first connecting element 30 of the first wiper arm
18 adjoin said play compensation recesses 74 in the longitudinal
direction 124. Starting from the base 56 of the base element 42 up
to the upper edges of the side walls 48, the play compensation
surfaces 47, 49 are inclined slightly inwards in order to
facilitate the assembly of the first connecting element 30. Said
play compensation recesses 74 as well as said play compensation
surfaces 47, 49 minimize together with the first and second play
compensation ribs 117, 118 the lateral play of the wiper blade 10
and therefore ensure a precise lateral guiding of the wiper blade
10.
[0032] In order to mount the sixth wiper arm 28 having a sixth
connecting element 40 to a wiper blade in accordance with a
sidelock principle, the base element 42 comprises an open hub 54 at
the open end of the assembly gaps 62 in the intermediate base 58.
Side walls 48 project above the hub 54, wherein the protruding
parts of the side walls 48 are configured as clips in order to hold
a bearing pin 164 of the sixth connecting element in the hub
54.
[0033] The protective cap 46 has a U-shaped cross-sectional profile
which is open to the base element 42 and is formed from two side
walls 94 and a top wall 96, which connects the side walls 94 to one
another. The side walls 94 have cutouts 102 on the lower
longitudinal edges thereof that face the base element 42 so that
said side walls 94 flushly adjoin with the guide edges 76 of the
intermediate base 58. The end face 98, which is designed in a
convex manner, adjoins an end face 99 of the closure cap 44, which
is correspondingly designed in a concave manner, and therefore the
side walls 82 and the top wall 80 of the closure cap 44 flushly
adjoin with the side walls 94 and the top wall 96 of the protective
cap 46.
[0034] Locking cams (104) facing inwards adjoin the cutouts 102 of
the protective cap 46 at the end on the wiper arm side, said
locking cams are pushed through the assembly gaps 62 and in the
assembly end position are suitably inserted into the receiving
chambers 66. A compound structure of the coupled parts 42, 44, 46
in the longitudinal direction thus results via the locking cams
104, the spring arms with the button 70, the cutouts 84 in the side
walls 82 of the closure cap 44 and in the end sides 98, 99 of the
protective cap 46 or respectively the closure cap 44.
[0035] The protective cap 46 further has lateral detent wings 106
at the end on the wiper arm side. Said detent wings have in each
case a stop 148 running approximately transversely to the
longitudinal direction and an angled stop 140, wherein both stop
surfaces face the closure cap 44. The angled stop 140 encloses an
obtuse angle with the stop 148. An aperture 108, through which the
connecting elements 34, 36, 38 of the wiper arms 22, 24, 26 can be
mounted, is situated on the end face 100 of the protective cap 46
on the wiper arm side. A detent nose 110, which is required for
mounting the fifth wiper arm 26, is mounted on the protective cap
46 in the region of the aperture 108.
[0036] FIG. 5 and FIG. 6 show the mounting of the first wiper arm
18 to an adapter 16 according to the invention. Only the base
element 42 and the closure cap 44 are required for this purpose. In
the initial position, said closure cap 44 is pushed in the
longitudinal direction 124 until reaching the stop 72 so that the
assembly gaps 62 are free. The first connecting element 30 of the
first wiper arm 18 can thereby be pushed in the direction of a
vertical axis over the side walls 48 of the base element, whereby
the locking cams 120 engage in the assembly gaps 62 and in the end
position lie in the receiving chambers 66 at the end of said
assembly gaps 62. In this position, first play compensation ribs
117 of the side walls 114 of the first connecting element 30 are
supported at the base or respectively at the guide edge 76. Said
first play compensation ribs fit without play against the first
play compensation surfaces 47 and therefore ensure a good lateral
guide. The side walls 114 are connected to each other by a top wall
116.
[0037] In a second step, the closure cap 44 is moved in the
longitudinal direction 124 onto the first wiper arm until the
button 70 on the spring arms 68 latches from the inside into the
cutouts 84 of the side walls 82 of the closure cap 44, said cutouts
being designed as apertures. The end position is depicted in FIG.
2. In this state, the bars 78 block the assembly gaps 62 so that
the locking cams 120 are caught in the receiving chambers 66. At
the same time, the play compensation button 50 latches into a
corresponding aperture 122 of the first connecting element 30,
whereby the connecting element 30 is held largely free of play via
the face edges 126 thereof, and the closure cap 44 and the spring
arms 68 are held largely free of play with the buttons 70. The play
compensation button 50 can also serve as a further securing
mechanism. For this reason, said play compensation button has a
detent edge 65 on the side facing the spring arms 68.
[0038] Whereas in the embodiment pursuant to FIGS. 5 and 6, the
first wiper arm 18 extends above the wiper blade 10 however
laterally offset with respect to the latter, the second wiper arm
20 extends above said wiper blade 10 (FIG. 2, FIG. 7). The second
connecting element 32 of said second wiper arm 20 is similarly
constructed as the first connecting element 30 of the first wiper
arm 18 and is mounted in the same way, wherein the locking cams 120
are likewise inserted into the receiving chambers 66. In contrast
to the first wiper arm 18, the second connecting element 32 of the
second wiper arm 20 has second play compensation ribs 118 on the
free longitudinal sides of the side walls 114, said compensation
ribs fitting into the play compensation recesses 74 on the outer
sides of the side walls 48 and minimizing the lateral play of the
wiper blade 10. In the assembled state, the convex end sides 127 of
the second connecting element 32 flushly rest against the concave
end sides 99 of the closure cap 44.
[0039] The third wiper arm 22 has an integrally formed third
connecting element 34, which has a U-shaped cross-sectional profile
and two side walls 132 which are connected to each other by a top
wall 134. A tongue 128 with a hole 130 is integrally formed on the
end face of the top wall 134. In the longitudinal direction offset
with respect to the third wiper arm 22, projections 136 are
integrally formed on the free longitudinal edges of the side walls
132, the border of said projections on the wiper arm side forming
an undercut 138.
[0040] During assembly, the adapter 16 is aligned approximately
parallel to the wiper blade 10. The third connecting element 34 is
pushed through an aperture 108 on the wiper side of the protective
cap 46, wherein the tongue 128 presses the detent cams 154 of the
protective cap 46 and the play compensation button 50 of the base
element 42 downwards. At the same time, the lateral detent wings
106 are pressed inwardly in a resiliently pliable manner until the
front end side 127 of the third connecting element 34 contacts the
shoulders 69 of the spring arms 68 and the detent wings 106 latch
laterally into the undercuts 138 of the third connecting element
34. In so doing, the angled stops 140 of the detent wings 106 fit
closely against the opposing edges of the undercuts 138 of the
third connecting element 34, and therefore the third connecting
element 34 is held in the longitudinal direction 124 between the
shoulders 69 on the one hand and the angled stops 140 on the other
hand. In order to laterally guide the wiper blade 10, the inner
sides of the side walls 132 of the third connecting element 34 fit
approximately without play against the play compensation surfaces
47 or 49 of the base element 42.
[0041] The fourth wiper arm 24 likewise has an integrally formed
fourth connecting element 36. Said connecting element 36 differs
from the third connecting element 34 by the form of the lateral
projections 144, which have stop edges 146 on the wiper arm side
that run substantially perpendicularly to the longitudinal
direction 124 and interact with the stops 148 of the detent wings
106 which also run perpendicularly to the longitudinal direction
124. Otherwise the assembly is the same as with the third wiper arm
22, wherein in the assembled position, the end side 129 of the
fourth connecting element 36 fits closely against the shoulders 69
of the spring rail 68 and the side wall 132 of the fourth
connecting element 36 fits approximately without play against the
play compensation surfaces 47 or 49 of the base element 42.
[0042] The fifth wiper arm 26 has substantially the form of a wiper
rod with a rectangular cross section. The fifth connecting element
38 thereof is integrally formed with said fifth wiper arm and has a
free end having an offset 150. A detent aperture 152 is situated
offset toward the wiper arm 26 in the longitudinal direction 124.
The detent aperture 152 latches in the end position with the detent
cam 154 of the protective cap 46 when the end side 151 of the
offset fifth connecting element 38 adjoins with the stop 142 on the
inner side of the end wall of the closure cap 44. During assembly,
the fifth connecting element 38 is pushed through the opening 108
of the protective cap 46, wherein the free end comprising the
offset 150 initially pushes back the detent cam 154 and the play
compensation button 50.
[0043] The sixth wiper arm 28 represents by means of the integrally
formed connecting element 40 thereof a so-called sidelock
connection to the wiper blade 10, in which the wiper arm 28 runs
laterally offset to the wiper blade 10. The sixth connecting
element 40 has a substantially U-shaped cross-sectional profile,
which is formed from two side walls 156 and a top wall 158, which
connects the two side walls 156 to each other. A bearing pin 164 is
riveted into both side walls 156. The rivet head is denoted with
the reference numeral 166. The bearing pin 164 is pushed, in a
position of the wiper blade 10 that is pivoted through 90 degrees,
through the bearing aperture 168 into the side wall of the
protective cap 46 into the open hub 54 of the base element 42 and
is retained by the assembly gaps 62 which are of clip-like design.
Offset with respect to the sixth wiper arm 28 in the longitudinal
direction, a bridge 160 is integrally formed on the sixth
connecting element 40 on the side of the adapter 16. Said bridge
overlaps the protective cap 46 and retains the adapter 16 with an
angled end 162 when the wiper blade 10 is pivoted back into the
initial position thereof.
[0044] Whereas the third to the sixth wiper arm 22, 24, 26, 28 can
be mounted with the corresponding connecting elements 34, 36, 38,
40 if the adapter 16 runs substantially parallel to the wiper blade
10, the adapter 16 for mounting the first or second wiper arm 18,
20 is rotated through an angle .alpha., preferably between
4.degree. and 8.degree. with respect to the end of the wiper blade
10. By means of the varying assembly angle .alpha., a sufficient
clearance is obtained to mount the first and second wiper arm 18,
20 and to insert the third to the fifth connecting element 34, 36,
38 of the third to the fifth wiper arm 22, 24, 26 through the
aperture 108 on the end face into the adapter 16 and to press the
play compensation button 50 downwards.
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